I have a 1997 auto gst the car is completely stock when i bought my gsx (about 8 months ago) i let the gst sit until about 3 months ago when i was trying to sell it. i would go out and let the gst run for about 15 mins every couple days. it would always start right up and run great until lets say "wednesday" i let it run for a little while shut it off went out to start it up again on "friday" and it would start up sputter and shut off. i have already checked the timing, replaced the plugs & wires, added 4 gallons of fresh gas and a can of sea form "there was only about a gallon of old gas in before i added fresh" replaced the MFI and fuel pump relays, checked the fuel pump, checked for boost leaks, swapped out the mass air flow sensor with the one out of my gsx and replaced the cam positioning sensor. As is stands right now the car will start, run and sputter while the rpm rise and fall without touching the throttle when you rev the engine to about 2k rpms it runs fine until you try and drive and it loses all power after you hit about 2k rpms then loses power and when you turn the ignition off it diesels about 4times before shutting off.

I really need to get this car going again as i have alot of work i need to get done to my gsx and i would really like to sell it... If any of you have some idea's please let me know and ill tell you the results.